منابع مشابه
Comparison of bioactivity between GSM 900 MHz and DCS 1800 MHz mobile telephony radiation.
An increasing number of studies find that pulsed Radio Frequency (RF), electromagnetic radiation of both systems of digital mobile telephony, established and commonly used in Europe during the last years, GSM 900 MHz (Global System for Mobile telecommunications) and DCS 1800 MHz (Digital Cellular System), exert intense biological action on different organisms and cells (Hardell et al., 2006; Hy...
متن کاملInfluence of 1800 MHz GSM-like electromagnetic radiation exposure on fracture healing.
BACKGROUND AND AIMS In this study, we aimed to investigate whether 1800 MHz frequency electromagnetic radiation (EMR) has an effect on bone healing. METHODS A total of 30 Wistar albino rats were divided into two equal groups. Fractures were created in the right tibias of all rats; next, intramedullary fixations with K-wire were performed. A control group (Group I) was kept under the same expe...
متن کاملPropagation Models for GSM 900 and 1800 MHz for Port Harcourt and Enugu, Nigeria
For the cellular networks to effectively cover a terrain or environment, accurate prediction of the coverage of the radio frequency signal is highly needed. Wave propagation models are essential and very important tools for determining the wave propagation characteristics for a particular environment. Path loss predictions are therefore required for the coverage planning, determination of multi...
متن کاملRecycling RF energy in the GSM-1800 band
In this paper, we present a study about the recuperation and the wireless transfer of the RF micro-energy in the waveband 1800 MHz -1900MHz. Actually, a series of measurements of the power RF available in the ambient surrounding using a spectrumanalyzer has enabled to us to determine the level of this power which is nearly constant in time and of order 14.5dBm/m2 (33.4μW/m2). Meanwhile, two typ...
متن کاملImpact of ultra wide band (UWB) on highways microcells downlink of UMTS GSM-1800 and GSM-900 systems
The Federal Communications Commission (FCC) agreed in February 2002 to allocate 7.5 GHz of spectrum for unlicensed use of ultra-wideband (UWB) devices for communication applications in the 3.1–10.6 GHz frequency band. The move represented a victory in a long hard-fought battle that dated back decades. With its origins in the 1960s, when it was called time-domain electromagnetics, UWB came to be...
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ژورنال
عنوان ژورنال: Inaque : Journal of Industrial and Quality Engineering
سال: 2020
ISSN: 2622-5816,2303-2715
DOI: 10.34010/iqe.v8i1.2766